Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec99248a47a5643…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 15:10:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e8fcb9f79353285368f2003568c0416c SHA-1: 27a9b7bd2198ec544dd9c3d7d62995068c9acec8 SHA-256: 7ec99248a47a5643a54277e84e8e012f3cfe5ff03126e8133515a1bc09053285
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-free-apk-java-edition-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/do-you-earn-robux-for-taking-free-items_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-executor-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-roblox-accounts-real_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-be-a-creeper-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/dev-free-camer-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-without-human-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-saber-simulator-hack-client_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E81 21992 bytes
SHA-256: 9fe440249de1bbc93adfadec5f43d71c30d05f4b16afe2ed132112afe690d42d
font_01_sfnt_off00005f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F12 18800 bytes
SHA-256: 5ca11b21852c978a3589f2a1e3ae77149b05caabc0c186675280143f50ca4da0

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